Machine for making tubes from paper-pulp



2 sheets-sheet 1.

*"(No Model.)

E. METZGER. Y MACHINE POR MAKING TUBES PROM PAPER PULP. No. 488,149.

VPauzerwlted Deo. 1 3, '1892.

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(No Model.)

2 Sheets- Sheet 2.

E. MBTZGBR. 'MACHINE FOR-MAKING'TUBBS PROM BAPBR PULP.- No. 488,149.

Patented Dec. 13, 1892.

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EDWARD ME'IZGER, OF PITTSBURG,

PATENT OFFICE.

ASSIGNOR OF ONE-HALF TO JAMES PETERS, OF LATROBE, PENNSYLVANIA.

MACHINE FOR MAKING TUBES FROM PAPER-PULP.

SPECIFIGATION forming part of Letters Patent No. 488,149, dated December 13, 1892.

Application tiled January 18, 1892. Serial No. 118,356- (NO model.)

To @ZZ whom it may concern:

Be it known that I, EDWARD METZGEE, of

Pittsburg, in the county of Allegheny and- State of Pennsylvania, have invented a new and useful Improvement in Machines for Making Tubes from Paper-Pulp, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1 is a side elevation of my improved tube-machine. Figs. 2 and 3 are front elevations with the forming-chamber in section, the plunger beingshown in two different positions. Fig. 4 is a similar view showing the parts in position for removing the formed tube. Fig. 5 is a top plan view. Figs. 6 and 7 are horizontal cross-sectional views on the lines VI VI and VII VII, respectively, of Fig. 2. Figs. 8 and 9 are perspective views of the top waterchamber and lower supporting-ring, respectively, and Fig. 10 is a similar view of the iinished tube.

Like symbols of reference indicate like parts in each of the figures.

My invention relatesto those machines which are employed for making tubes from paperpulp; and it consists in an improved arrangement and combination of the co-operating parts, all as hereinafter more fully described, and set forth in the claims.

In the drawings, 2 represents a forming-cylinder, which is supported in a substantially- Vertical position by means of the bolts passing through the integral lugs extending from its sides,'as shown. In this cylinder is arranged to reciprocate the compressing-plunger 3, provided near its lower end with the annular flange 4, this plunger terminating beneath in the rack 5, in termeshing with pinion 6 upon the shaft 7. Interlneshing with a gearwheel 8, also upon theshaft 7, is a second pinion upon a shaft 9, to which a rotation in either direction is communicated by the pulleys 10 and l1 and clutches 12 and 13. By means of this intermediate gearing a slow motion in either direction may be imparted to the plunger. In the upper end of the forming-cylinder are dovetailed two slides 14 and 15, each provided with a registering semicircular recess, the circular hole thus formed when the slides are closed being the same size as the plunger. A suitable holding device, such as set-screws 16, is provided for locking the slides in closed position.

The cylinder is provided with suitable air and water exit holes 17 along its sides,and at its extreme upper end,j ust below the anges supporting the slides 14 and 15,is provided a circular series 18 of somewhat larger holes. The water-chamber 19 of Fig. 8, as shown, consists of two rings connected bypins, and this chamber is adapted to fit loosely in the cylinder around the plunger, as shown in Figs. 2 and 3. The lower supporting-ring 20 of Fig. 9 is provided with suitable legs or pins which hold the ring away from the flange 4 upon which the pins rest.

The action is as follows: The plunger being in its lowest position and the slides 14 and 15 opened, the ring 2O is dropped over the upper end of the plunger and pushed downwardly to place against the fiange 4. A funnel or other suitable guiding device being placed over the top of the cylinder the stock to form the tube is fed therethrough into the annular space in the cylinder until it is nearly filled. The water-chamber is then slipped over the plunger and pushed down sufficiently to allow the closing of the slides. The said slides are then closed and fastened and aslow upward motion imparted to the plunger. The supporting-ring rising compresses the material beneath the waterchamber and the water and air escape through the side holes and into thev water-chamber, passing thence through holes 18. When the material has been sufficiently raises the formed cylinder upon the ring 2O until said ring is exposed above the top of the cylinder, when the slides are again pushed in and the plunger being lowered the tube with the water-chamber and supporting-ring is stripped therefrom. After the slides are Ice retains the as yet Weak and fragile tube in shape and prevents any tearing or breaking of the same. The tube may then be removed in this surrounding case, and a mandrel be ing passed therethrough the tube is hung up to dry and thoroughly season, by which process it becomes very hard and solid. By forming a battery of these cylinders and extending the shafts 7 and 9 so as to carry all the gears for the various cylinders,lcan form a series of tubes simultaneously, thus greatly cheapening and facilitating their manufacture.V p The plunger may be hollow or solid and the iiange 4 either castv integral therevvith or fastened thereto, and many other variations in the form and arrangement of the parts and the material employed may be 'made Without departing from my invention.

The advantages of the device are obvious. On account of the vertical position of the formv ing-cylinder the stock is easily fed in and packs itself somewhat in the act of feeding. The parts are few in number and not liable to get out of order, While the forming and removal of the tube are rendered 'easy and certain;

I claim 'as my invention-4 A l. A machine for making tubes from pulp, comprising a vertical forming-cylinder, a 4compressing-plunger having an annular Waterchamber fitting about thesame,an movable plates having recesses to fit about the plunger and lclose the upper end 'of the cylinder, sub# stantially as and for the purposes described.

2. A machine for making tubesfrom paperpulp, comprising avertical forming-cylinder. a compressing-plunger movable therein and having an annular liange, and a ring having Vsupporting pins arranged to rest upon the flange, substantially as and for the purposes described. K s

3. A machine for making tubes from paperpulp, comprising a vertical forming-cylinder, a compressing-plunger movable therein and having an annular Ilan ge, and an annular Water-chamber arranged to fit about the plunger at the upper end of the cylinder, substantially as and for the purposes described.

4; A machine for making tubes from paperpulp, comprising a vertical forming-cylinder,`

a compressing-plunger movable therein and having an annular flange, a ring having supporting-pins arranged to rest upon the flange, and an annular Water-chamber arrangedto iit about the plunger at the upper end of the cylinder, substantiallly1 `as and for the .purposes described.v

5. A machine for makin-g tubes from paperpulp, comprising a forming-cylinder,I a compressingplunger, and a Water-chamber ar` ranged to fit about the plunger, substantially as and for the purposes described.

In testimony whereof `I have hereunto set my hand this 14th dayof January, A.D.;18-92.

EDWARD METZGER.

Witnesses:

H. M. CORWIN, DAVID S. MCCANN. 

